Second Problem Outlook Lan (very Different)

this is the second problem.set up1 computer connected by USB to Mt841 Smartax modem, connects to internet using os based pppoe driver.this computer connected to the smartax modem by LAN as well. MT841 modem connects to a 50 port server switch of which 16 computers are already connected.Internet sharing works fine but i have to use the program free proxy to get all computers acces.main problem is outlook express or 2003 both do not work, we use our own e-mail from our website but can only use it on the first computer all others (ie through the server switch) are unable to utilise the outlook express. I have tried changing all the servers using all the ones, i have added server authentication and used my broadband details everything.any help would be appreaciated

Install some POP3 proxy as well on the computer that is running proxy.